Caliper twist tool???

Hey everyone,

Its been a while since Ive been on, and I apologize! But I have a question... Noob, Maybe...

I was discussing changing my rotors and pads tomorrow, which I have done on other cars plenty of times but never my 6, when a friend of mine stopped me and told me that I may need something called a "Caliper twist tool". He explained to me that with the rear calipers, I may not be able to use just a regular C clamp to open them up. And this tool is a "dealer tool".

Can someone tell me whether or not I actually need this thing? Or will I be ok to continue with just my C clamps?

Thanks guys,
Darren